(19)
(11) EP 1 275 957 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.06.2003 Bulletin 2003/23

(43) Date of publication A2:
15.01.2003 Bulletin 2003/03

(21) Application number: 02012631.4

(22) Date of filing: 06.06.2002
(51) International Patent Classification (IPC)7: G01N 30/16, G01N 30/18, G01N 1/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 14.07.2001 US 907254

(71) Applicant: LEAP TECHNOLOGIES, INC.
North Carolina 27510 (US)

(72) Inventors:
  • Martin, Werner
    Carrboro, NC 27510 (US)
  • Tobien, Thomas
    Durham, NC 27713 (US)

(74) Representative: Schurack, Eduard F. et al
Hofstetter, Schurack & Skora Balanstrasse 57
81541 München
81541 München (DE)

   


(54) Self-washing injection apparatus


(57) Self-washing injection apparatus [101] for liquid chromatography injection valves utilizes an interior chamber [105] with a penetrable seal [109] at the top end of the chamber and a needle sleeve seal [113] at the bottom end of the interior chamber. A wash port [145] in the body [103] of the apparatus connects one or more sources of wash fluid to the interior chamber between the penetrable seal and the sleeve seal. The apparatus provides a simple and effective means to aspirate or pump wash fluids from one or more wash fluid reservoirs through the apparatus, the injection port of the injection valve, and associated components.






Search report